N.Y.C. Admin. Code § 27-2056.7

2. A property owner may rebut the information provided by the tenant or another source in accordance with this subdivision regarding the date upon which the current tenancy of such multiple dwelling unit began by submitting documents in accordance with rules of the department. A property owner may correct a violation of section 27-2056.8 by abating the friction surface that tested positive and either (i) providing results of XRF tests for all other window and door friction surfaces within the dwelling unit that demonstrate such surfaces do not contain lead based paint, or (ii) providing documentation satisfactory to the department to demonstrate appropriate abatement of all other window and door friction surfaces within the dwelling unit.

c. The department is not required to undertake the procedures specified in this section in a particular multiple dwelling if it has done so in such building during the prior twelve month period.

d. Any owner who fails to comply with the provisions of this section in accordance with the rules of the department shall be liable for a class C immediately hazardous violation, and a civil penalty in an amount not to exceed one thousand dollars.